Requirements, Risks and Incidents Associated With NFPA 652 Direction to Control Combustiblle Dust Hazards. Not all Enclosureless Dust Collectors (EDCs) are intended for combustible dust.

NFPA 652 – 2016, Standard on the Fundamentals of Combustible Dust, defines an enclosureless dust collector (EDC) as, “An air-material separator (AMS) designed to separate the conveying air from the material being conveyed where the filter medium is not enclosed or in a container”. Commodity-specific NFPA standards offer more detailed definitions. EDCs may also be known as Positive Pressure Open Dust Collectors.

Enclosureless dust collectors (EDCs) are commonly used in the woodworking industry and home woodworking shops. They are also present in other var…